JpGU-AGU Joint Meeting 2017

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[JJ] Oral

A (Atmospheric and Hydrospheric Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS11] [JJ] Atmospheric Chemistry

Wed. May 24, 2017 10:45 AM - 12:15 PM 301B (International Conference Hall 3F)

convener:Hitoshi Irie(Center for Environmental Remote Sensing, Chiba University), Toshinobu Machida(National Institute for Environmental Studies), Hiroshi Tanimoto(National Institute for Environmental Studies), Yoko Iwamoto(Graduate School of Biosphere Science, Hiroshima University), Chairperson:Naga Oshima(Meteorological Research Institute), Chairperson:Hideki Nara(Global Carbon Cycle Research Section, Center for Global Environmental Research, National Institute for Environmental Studies)

11:45 AM - 12:00 PM

[AAS11-23] Sources and effects of atmospheric nitrous acid in the marine boundary layer

*Likun Xue1, Qiaozhi Zha2, Liang Wen1, Tao Wang2, Wenxing Wang1 (1.Shandong University, 2.The Hong Kong Polytechnic University)

Keywords:Nitrous acid (HONO), Sources, Effects, Marine boundary layer

Nitrous acid (HONO) is an important reservoir of hydroxyl (OH) radicals in the atmospheric boundary layer. However, its sources are still not well understood. As few HONO observations have been performed in marine areas, we conducted measurements at two coastal sites, Tuoji Island in North China and Hong Kong, to investigate the sources and effects of HONO in the marine boundary layer. Compared with urban sites, HONO concentrations were low in marine sites. However, they were still significantly larger than that could be explained by the mechanisms in photostationary state (PSS). Through case study, results have indicated an interesting phenomenon that HONO may be produced faster on sea surface than on land surface. And further studies should be carried out to confirm this finding. In addition, HONO plays an influential role in atmospheric oxidative capacity and air quality in coastal regions.